· 5. in inventory control, the economic order quantity is the a. optimum lot size b. highest...
TRANSCRIPT
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1. Which of the following Bird Sanctuary
is located in Gujarat?
A. Nal Sarovar Bird Sanctuary
B. Harike Bird Sanctuary
C. Kanjirankulam Bird Sanctuary
D. Great Indian Bustard Sanctuary
Ans. A
Sol.
• Nal Sarovar Bird Sanctuary is
situated in Ahmedabad, Gujarat.
• It is the largest wetland bird
sanctuary in Gujarat, and one of the
largest in India.
• Nalsarovar was declared as a
Ramsar site on 24th September
2012.
• Since 2005 it is the only lake that
has been declared as Ramsar site in
India.
2. Sum of buffer stock, reserve stock
and safety stock is equal to
A. recorder point
B. maximum inventory level
C. EOQ
D. None of these
Ans. A
Sol. Safety/Buffer stock is excess
inventory that acts as a buffer
between forecasted and actual
demand levels. This inventory is
maintained so that a company has
sufficient units on hand to meet
unexpected customer and production
demand.
The safety stock formula is as follows:
(Maximum daily usage - Average
daily usage) x Lead time = Safety
stock
3. An orthogonal cutting operation is
being carried out under the following
conditions Cutting speed (V)=2m/s,
depth of cut=0.5 mm, chip
thickness=0.6 mm
Then chip velocity is:
A. 2 m/s B. 1.66 m/s
C. 1 m/s D. None of these
Ans. B
Sol. Relation between cutting velocity and
chip velocity
VC×TC = V×T
where Vc chip velocity
Tc chip thickness
V cutting velocity
T depth of cut
Vc× 0.6 = 2 × 0.5
Vc = 1.66 m/s
4. Why water drops come down
spherical in shape?
A. Due to Surface Tension
B. Air Friction
C. Continuous evaporation
D. None of the above
Ans. A
Sol. •Spherical area has less water
surface tension.
•The Surface tension pulls the surface
of the drop equally at all points thus
produces the spherical shape having
the minimum surface area.
5. In inventory control, the economic
order quantity is the
A. optimum lot size
B. highest level of inventory
C. lot corresponding to break-even
point
D. capability of a plant to produce
Ans. A
Sol. In inventory management, economic
order quantity (EOQ) is the order
quantity that minimizes the total
holding costs and ordering costs. It is
one of the oldest classical production
scheduling models.
EOQ means optimum lot size.
6. In a free expansion process for ideal
gas
A. Work done is zero
B. heat transfer is zero
C. Both A and B aboe
D. None of these
Ans. C
Sol. Free expansion for ideal gas, Work
done = zero because, free expansion
is a irreversible adiabatic and
isothermal process.
Due to isothermal, there is no
temperature change and hence no
internal energy change occurs.
Due to adiabatic, there is no heat flow
between system and surrounding .i.e.
dQ = 0
7. In an elastic collision
A. The initial kinetic energy is equal
to the final kinetic energy
B. The final kinetic energy is less
than the initial kinetic energy
C. The kinetic energy remains
constant
D. The kinetic energy first increases
then decreases
Ans. A
Sol. In an elastic collision the initial kinetic
energy is equal to the final kinetic
energy.
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8. Second law efficiency for all reversible
processes will be equal to
A. Carnot efficiency
B. 100 %
C. 0 %
D. Infinitely efficient
Ans. B
Sol. actual
rev.
Secondary law efficiency
=
For reversible energy, actual rev. =
Therefore, second law efficiency for
all reversible processes will be 100%
9. Black colour is generally painted on
A. oxygen cylinder
B. acetylene cylinder
C. hydrogen cylinder
D. none of these
Ans. A
Sol. Oxygen cylinder is green in the US
and in India colour of the body is
black (lower part) and that of the
shoulder (upper part) is white.
10. A hot wire Anemometer is used for
the measurement of
A. Velocity of gases
B. Pressure of gases
C. Viscosity of liquids
D. Temperature of liquids
Ans. A
Sol. It is mainly used for the measurement
of velocity of gases.
11. In a spreadsheet, a _____ is a
number you will use in a calculation.
A. label B. cell
C. Field D. value
Ans. D
Sol. Spreadsheets are useful at home
and in business applications.
Spreadsheets make it easy to view
and exhibit data in a number of
manners. Values are one of the
primary types of data used in
spreadsheets.
12. The propulsive force drives the jet in
the ________
A. Backward direction
B. Forward direction
C. Perpendicular direction
D. Parallel movement
Ans. B
Sol. Force exerted by a jet on a moving
plate happens in three cases. The
three cases are classified depending
on their position. The propulsive force
drives the jet in the forward direction.
A good example is the aircraft or a
boat.
13. The resultant upward pressure of a
fluid on a floating body is equal to the
weight of the fluid displaced by the
body. This is known as:
A. Pascal law
B. Buoyancy force
C. Specific gravity of liquid
D. Viscosity of liquid
Ans. B
Sol. According to Archimedes Principal
when a body is immersed in a fluid
there is an upward force exerted by
the fluid on the object that lifts the
object and is equal to the weight of
the displaced fluid.
14. Plug gauge is used to measure:
A. Shaft size
B. Hole size
C. Wire thickness
D. Depth of threads
Ans. B
Sol. Plug gauge are used only to measure
internal diameter of the hole. Wire
thickness is measured by micrometer.
Depth of a thread is measured by
Leitech gauge. Shaft size can be
measured by vernier caliper or
micrometer.
15. Who is selected for the prestigious
'Sangita Kalanidhi' award 2019?
A. M.S. Sheela
B. Rajkumar Bharathi
C. S. Sowmya
D. Seetha Narayanan
Ans. C
Sol.
• Dr. S Sowmya will be conferred the
prestigious ‘Sangita Kalanidhi’
award during the ‘Margazhi Music
Festival’ early next year (2020).
• She will preside over the 93rd
annual conference of The Music
Academy to be held from
December 15th, 2019 to January
1st, 2020.
• She is known for her intellectual
approach to music.
• She is also part of the Academic
Council of the Tamil Nadu Music and
Fine Arts University.
• Sangita Kalanidhi Award is an
annual award presented by Madras
Music Academy (MMA).
• It is considered as the highest
accolade in field of Carnatic music.
• It comprises of gold medal and a
birudu patra (citation).
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16. What is the other name used for
Terylene polyester fibre?
A. Dacron B. Teflon
C. Nylon D. Rayon
Ans. A
Sol.
* Dacron or Terylene is the best
known example of polyesters.
* The fibre was first created in 1941 by
chemist J R Whinfield.
* Dacron fibre is elastic in nature and
crease resistant and is used in
blending with cotton and wool fibre
and also as glass reinforcing materials
in safety helmets.
17. Which of these processes surely
increases the COP of refrigerator?
A. Superheating
B. Subcooling
C. Increase in condenser pressure
D. Decrease in evaporator pressure
Ans. B
Sol. Subcooling is the only process that
increases COP for sure whereas
superheating conditionally increases
COP
18. Transformer an electric device is
based on which of the following law?
A. Faraday’s law of induction
B. Law of thermodynamic
C. Gauss’s law
D. Coulomb’s law
Ans. A
Sol. A transformer is an electrical device
that transfers electrical energy
between two or more circuitsthrough
electromagnetic induction. A
varying current in one coil of the
transformer produces a varying
magnetic field, which in turn induces
a voltagein a second coil. Power can
be transferred between the two coils
through the magnetic field, without a
metallic connection between the two
circuits. Faraday's law of induction
discovered in 1831 described this
effect.
19. Maximum deflection in a cantilever
beam due to pure bending moment M
at its end is
A. 2ML
3EI B.
3ML
3EI
C. 2ML
2EI D.
2ML
4EI
Ans. C
Sol. Maximum deflection in a cantilever
beam due to pure bending moment M
at its end is 2ML
2EI.
20. How many states of India share
border with Myanmar?
A. 5 B. 3
C. 2 D. 4
Ans. D
Sol. • The four northeast Indian states
share border with Myanmar.
• These states share 1,643 km
border with Myanmar.
• These 4 states are Arunachal
Pradesh, Nagaland (215 Km),
Mizoram (510 Km) and Manipur (398
Km).
• Arunachal Pradesh (520 Km)
shares longest border with Myanmar.
• Myanmar shares its border with
India, China, Bangladesh, Thailand
and Laos.
21. In order to have interference fit, it is
essential that the lower limit of the
shaft should be:
A. Greater than upper limit of the
hole
B. Lesser than upper limit of the hole
C. Greater than lower limit of the
hole
D. Lesser than lower limit of the hole
Ans. A
Sol. In interference fit there is an
overlapping zone that is provided by
making lower limit of the shaft slightly
greater than the upper limit of the
hole. Interference fit also known as
press fit or friction fit which is
achieved by friction after the parts
are pushed together. Used to mount
wheels on an axle to make wheel set.
22. Who wrote “Mind without fear” ?
A. Ira Trivedi
B. Twinkle Khanna
C. Khuswant Singh
D. Rajat Gupta
Ans. D
Sol. • Rajat Kumar Gupta is an Indian-
American businessman who was the
first foreign-born managing director
(chief executive) of management
consultancy firm McKinsey &
Company from 1994 to 2003.
• Gupta's memoir, Mind Without Fear,
was published by Juggernaut Books
and released in March 2019.
23. Oracle is an example of ______
application software.
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A. Database
B. word processing
C. project management
D. presentation graphics
Ans. A
Sol. A database is a collection of
information that is organized so that
it can easily be accessed, managed,
and updated. Databases can be
classified according to types of
content,bibliographic, full-text,
numeric and images.
Oracle Database is a multi-model
database management system
produced and marketed by Oracle
Corporation.
24. In Centre less grinding, work piece is
clamped in:
A. Bed B. Vice
C. Chuck D. None of these
Ans. D
Sol. In centerless grinding work piece is
held between wheels, one wheel is
rotating and other one is regulating
wheel. Feed is given in three ways to
the work. According to the question
no option will be corrected.
25. The degree of constraint of a sphere
in V- block is?
A. 2 B. 3
C. 1 D. 4
Ans. A
Sol. Degree of freedom is 4(3 rotational 1
translational) therefore degree of
restraint is 6-4=2
26. Who among the following has
invented Java?
A. James Gosling
B. Dannis Retchie
C. Bill Gates
D. Steve Jobs
Ans. A
Sol. James Arthur Gosling is a Canadian
computer scientist best known as the
father of the Java programming
language.
27. Who has been appointed as the
Governor of Chhattisgarh?
A. Anandiben Patel
B. Anusuiya Uikey
C. Raman Singh
D. Deepak Mishra
Ans. B
Sol. • Rajya Sabha member Anusuiya
Uikey has been appointed as
Governor of Chhattisgarh.
• She has replaced Anandiben
Patel.
• She was previously holding the post
of Minister of Women and Child
Development in the Madhya Pradesh
government.
• She is the first tribal women to
hold the post of Governor of
Chhattisgarh since the formation of
state in 2000.
• She was appointed as Governor of
Chhattisgarh on 16th July 2019.
• She is the sixth Governor of
Chhattisgarh.
28. Which of the following is a copper free
alloy?
A. German Silver
B. Muntz Metal
C. White metal
D. Gun metal
Ans. C
Sol. A white metal alloy may include
antimony, tin, lead, cadmium,
bismuth, and zinc (some of which are
quite toxic)
29. Which of the following measuring
device is used for measuring the rate
of flow of a fluid flowing through a
pipe:
A. Venturi meter
B. Orifice meter
C. Pitot tube
D. All of these
Ans. D
Sol. All of the above devices are used to
measure rate of fluid flow in a pipe.
In venturi meter and orifice meter
rate is determined by measuring the
deflection of manometric fluid in a
manometer installed with devices
while in pitot tube by measuring
stagnation pressure head rate of flow
is determined.
30. Which of the following is correct?
A. In steady flow, pathlines and
streamlines are identical
B. In steady flow, pathlines and
streaklines are identical
C. In steady flow, streaklines and
streamlines are identical
D. In steady flow, pathline,
streamlines and streaklines are all
identical
Ans. D
Sol. In case of a steady flow, the velocity
at a point remains constant with time.
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Thus, there will be no geometrical
distinction between the pathlines,
streamlines and streaklines.
31. Generally least count of the
commonly used vernier is:
A. 0.1 mm B. 0.01 mm
C. 0.02 mm D. 0.2 mm
Ans. C
Sol. Least count for any vernier = 1
M.S.D - 1V.S.D.
L.count = 1mm – 0.98
= 0.02mm
32. The working of a rocket is based on
the principle of
A. Conservation of momentum
B. Conservation of mass
C. Conservation of energy
D. Conservation of angular
momentum
Ans. A
Sol. • Rocket engines are reaction
engines, obtaining thrust in
accordance with Newton's second
law (Conservation of
momentum).
• Rocket thrust results from the high
speed ejection of material and does
not require any "push against".
Conservation of momentum dictates
that if material is ejected backward,
the forward momentum of the
remaining rocket must increase since
an isolated system cannot change its
net momentum. The hot gases
acquire momentum in the backward
direction & the rocket acquires an
equal amount of momentum in the
forward direction.
• Hence option A is the right answer.
33. The total area under the stress-strain
curve of a mildsteel specimen tested
up to failure under tension is a
measure of its:
A. Breaking strength
B. Toughness
C. Hardness
D. Stiffness
Ans. B
Sol. Area under stress strain diagram of
any specimen tell us energy stored till
failure. For a mild steel specimen upto
elastic limit area is known as
resilience while area under stress
strain curve upto fracture is known as
toughness.
34. Baron Jons Jacob Berzelius
discovered which of following?
A. Catalysis B. Ions
C. Valency D. Oxidation
Ans. A
Sol. • Catalysis was discovered by Baron
Jöns Jacob Berzelius.
• Berzelius himself discovered and
isolated several newelements, including
cerium (1803) and thorium (1828).
• He developed classical analytical
techniques, and investigated isomerism
and catalysis, phenomena that owe their
names to him.
• Catalysis is a term which used for the
reactions/ processes which occur in
the presence of certain substances that
increase the rate of the reaction without
being consumed.
35. The stress induced in a member when
expansion and contraction due to
temperature variation prevented is
A. Shear Stress
B. Tensile Stress
C. Compressive Stress
D. Thermal Stress
Ans. D
Sol. Thermal stress is induced when
expansion and contraction due to
temperature variation prevented.
36. Breaking stress is
A. Greater than ultimate stress
B. Less than ultimate stress
C. Equal to the ultimate stress
D. None of these
Ans. B
Sol. Breaking stress is less than ultimate
stress.
37. India Africa Field Training Exercise
(IAFTX)- 2019 was conducted in
which state of India?
A. West Bengal
B. Goa
C. Maharashtra
D. Kerala
Ans. C
Sol. • Indian Africa Field Training
Exercise (IAFTX) was held at Aundh
Military Station and College of
Military Engineering, Pune,
Maharashtra.
• It was held from 18th March to 27th
March 2019.
• The exercise was conducted with an
aim to synergise United Nations
peacekeeping operations.
38. If stream function (Ψ) satisfies the
Laplace equation, it is a possible case
of
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A. a circular flow
B. a rotational flow
C. an irrotational flow
D. none of the above
Ans. C
Sol. If stream function (Ψ) satisfies the
Laplace equation, it is a possible case
of an irrotational flow
39. In an orthogonal cutting operation,
the depth of cut is 0.30mm and the
chip thickness is 0.75mm. If the
cutting speed is 3m/s, calculate the
chip velocity.
A. 1.2m/s B. 2m/s
C. 2.5m/s D. 3m/s
Ans. A
Sol. Chip thickness ratio, r = uncut chip
thickness / chip thickness after cut
For orthogonal operation uncut chip
thickness = depth of cut = 0.30mm
Therefore, r = 0.30/0.75 = 0.4
Chip velocity = r X Cutting velocity
Chip velocity = 0.4 X 3 = 1.2m/s
40. MRP indicates
A. Materials Reordering Point
B. Materials Reordering Planning
C. Materials Requirements Planning
D. Materials Requirements Point
Ans. C
Sol. Material requirements planning (MRP)
is a production planning, scheduling,
and inventory control system used to
manage manufacturing processes.
Most MRP systems are software-
based, but it is possible to conduct
MRP by hand as well.
41. Copyrighted software that can be
used for free is _______.
A. Commercial software
B. freeware
C. groupware
D. e-mail
Ans. B
Sol. Freeware is copyrighted computer
software which is made available for
use free of charge, for an unlimited
time.
42. To avoid cavitation in centrifugal
pumps
A. delivery pressure should be high
B. delivery pressure should be low
C. suction pressure should be high
D. suction pressure should be low
Ans. C
Sol. To avoid cavitation, suction pressure
should be above vapour pressure of
liquid, so suction pressure should be
high.
43. Which of the following is a point
function?
A. Work B. Heat
C. Energy D. None of these
Ans. C
Sol. We know that, when a system
changes from state 1 to state 2, the
change in internal energy (ΔE) of the
state 2 is same as that of the state 1.
Therefore value of internal energy of
the system is independent of the path
followed by the system. It has a fixed
value along the path, therefore
energy is the point function.
44. Total amount of energy in the
universe is
A. Increasing B. Decreasing
C. Constant D. None of these
Ans. C
Sol. The first law of thermodynamics
states that the energy can neither be
created nor be destroyed. It can only
get transformed from one form to
another form. The universe consists
of the system as well as the
surrounding together. Energy can
only be transferred from system to
surrounding or surrounding to system
in various forms, but it can never be
destroyed or created. Thus the total
amount of energy in the universe is
constant. We cannot produce a device
which can supply mechanical work
without consuming any energy.
45. Standard time represents
A. normal time + allowances
B. normal time + idle time +
allowances
C. normal time + idle time
D. none of the above
Ans. A
Sol. Standard time =normal time
+allowance Where; normal time
=avg time *rating factor. (take rating
factor between 1.1 and 1.2)
46. The open circuit voltage and short
circuit current for a welding operation
are given as 70V and 200A . For the
condition of max power what should
be the setting of voltage and current
A. 70V 200A
B. 70V 100A
C. 35V 100A
D. 35V 200A
Ans. C
Sol. We know that maximum arc power
occurs at half the value of open circuit
voltage and short circuit current.
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Therefore, voltage = 35V and current
= 100A
47. Which of the following is responsible
for Stress-concentration in a body?
A. extensive stress
B. non-uniform stress
C. reverse stress
D. fluctuating stress
Ans. B
Sol. Stress concentration is the
accumulation of stress in a body due
to sudden change in its geometry.
When there is a sudden change in the
geometry of the body due to cracks
sharp corners, holes and decrease in
the cross section area, then there is
an increase in the localised stress
near these cracks, sharp corners,
holes, and decreased cross section
area. The body tends to fail from
these places where the stress
concentration is more. So to prevent
a body from getting failed, the stress
concentration should be avoided or
reduced.
48. Which of the following is also known
as military organisation?
A. line organisation
B. line and staff organisation
C. functional organisation
D. effective organisation
Ans. A
Sol. Line or Scalar Organisation: This type
of organisation is also known as
departmental or military type of
organisation. In this type of
organisation business activities are
divided into three groups, namely
finance and accounts, production and
sales.
49. PERT has following time estimate:
A. One time estimate
B. Two time estimate
C. Three time estimate
D. Four time estimate
Ans. C
Sol. PERT has three time estimate.
50. The electric resistance welding
operates with:
A. Low current and high voltage
B. High current and low voltage
C. Low current and low voltage
D. High current and high voltage
Ans. B
Sol. Electric arc welding is operated with
high current and low voltage because
high current produces more heat. If
voltage is high during welding molten
particles moves at a greater speed
during transfer of filler metal and will
not flow properly over base metal.
51. The efficiency of diesel cycle
approaches to Otto cycle efficiency
when
A. cutoff is decreased
B. cutoff is increased
C. cutoff is zero
D. cutoff is constant
Ans. C
Sol. When cutoff is zero, then efficiency of
otto and diesel become same.
52. The Gulf of Aden connects Arabian
Sea to which Sea?
A. Red Sea
B. South China Sea
C. Caspian Sea
D. Andaman
Ans. A
Sol. • The Gulf of Aden connects the
Arabian Sea to the Red Sea.
• The Gulf of Aden connects the
Arabian Sea and the Red Sea through
the strait of Bab-el-Mandeb.
• The Gulf of Aden connects with the
Indian Ocean through the
Guardafui Channel.
• The Arabian Sea is a region of the
northern Indian Ocean bounded on
the north by Pakistan and Iran.
53. Which of the following welding
process is used to weld ends of two
pipes of uniform cross-section ?
A. spot welding
B. seam welding
C. projection welding
D. upset butt welding
Ans. D
Sol. Upset butt welding is a welding
technique that produces coalescence
simultaneously over the entire area of
abutting surfaces or progressively
along a joint, by the heat obtained
from resistance to electric current
through the area where those
surfaces are in contact.
54. There is a prismatic bar of diameter
d, mass m kg and length L. Then
elongation due to its self weight is
proportional to:
A. d0 B. d
C. d2 D. d-2
Ans. A
Sol. Elongation due to self weight =
Wl/2AE = ꝭgl2/2E
Hence, elongation does not depend
on the bar diameter.
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55. Slenderness ratio of a column is
defined as the ratio of its length to its
A. Least radius of gyration
B. Least lateral dimension
C. Maximum lateral dimension
D. Maximum radius of gyration
Ans. A
Sol. Slenderness ratio of a column is
defined as the ratio of its length to its
least radius of gyration.
56. Which of the following are used to
make Ball bearings?
A. Carbon steel
B. Cast iron
C. Carbon chrome steel
D. Stainless steel
Ans. C
Sol. Bearings Made of Chrome Steel - SAE
52100. The most common material
used to produce the load carrying
components in precision ball
bearings, roller bearings, and tapered
roller bearings is 52100 chrome steel.
These components are the bearings
inner and outer rings, balls and
rollers.
57. In centrifugal pump, the liquid enters
the pump from
A. bottom B. top
C. centres D. sides
Ans. C
Sol. In centrifugal pump, the liquids enter
from the eye of the impeller ie.
centre.
58. Two cutters are mounted on the arbor
so that two faces are machined
simultaneously in
A. Gang milling
B. Straddle milling
C. Pendulum milling
D. Profile milling
Ans. B
Sol. Such a mechanism is employed in
Straddle Milling.
In Gang milling more than 2 cutter
employed.
59. Prandtl number is a ratio between
A. Kinematic viscosity to Thermal
diffusivity
B. Thermal diffusivity to Kinematic
viscosity
C. Dynamic viscosity to Thermal
diffusivity
D. Thermal diffusivity to Dynamic
viscosity
Ans. A
Sol. Prandtl number is the dimensionless
number which is a property of the
fluid defined as the ratio between
Kinematic viscosity of the fluid of its
Thermal diffusivity.
So the correct option is (a).
60. The conditions for the stable
equilibrium of a floating body are:
A. The meta-centre should lie above
the centre of gravity
B. The centre of buoyancy and the
centre of gravity must lie on the
same vertical line
C. A righting couple should be
formed
D. All the above are correct
Ans. D
Sol. All of the above are correct options.
Stability of Floating Body
(a) Stable Equilibrium : if the point M
is above G.
(b) Unstable Equilibrium : If the point
M is below G.
(c) Neutral Equilibrium : If the point M
is at the G.
Moment due to weight and buoyant
forces balance from overturning
effect.
61. The size of the lathe is expressed as:
A. Gross weight of the lathe
B. Diameter of the chuck
C. Maximum speed of the chuck
D. Swing of the lathe
Ans. D
Sol. Lathe is Generally specified by
1 Swing over the carriage
2 Swing over the bed
3 Swing over the spindle
62. Which of the following stress can be
determined using Mohr’s circle
method?
A. Torsional stress
B. Bending stress
C. Principal stress
D. All of the above
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Ans. C
Sol. Principal stress can be determined
using Mohr’s circle method.
63. Pollution of water is maximally due
to___
A. animal activities
B. human activities
C. alien activities
D. all of the above
Ans. B
Sol. The water pollution is caused by the
addition of organic and inorganic
chemicals as well as the biological
materials which change the physical
and chemical properties of water.
Most of these harmful activities are
done by human.
64. Hardness of river water is because it
contains.
A. Sodium Chloride
B. Salts of Calcium and Magnesium
C. Both A and B
D. None of These
Ans. B
Sol. River water is harder than rain
water because it contains salts of
Calcium and Magnesium. As the
river water seeps through the ground,
it is naturally purified and picks up
minerals from the rocks it seeps
through. Typical minerals are sulfur,
lime, magnesium and calcium.
After it soaks up enough of these
minerals to have a concentration of at
least one grain per gallon, or GPG,
the water is said to be hard.
65. A tank containing air is stirred by a
paddle wheel. The heat transferred to
the surrounding from the tank is 4000
kJ and work input to the paddle wheel
is 10000kJ. The external workdone by
the system is
A. 10000kJ B. 6000kJ
C. 4000kJ D. Zero
Ans. D
Sol. From 1st law of thermodynamics,
ΔQ = ΔU + ΔW
–4000 = ΔU + (–10000)
ΔU = 6000 kJ
All energy is stored in the form of
internal energy and there is no
external workdone by the system.
66. The triple point on a T-S diagram is
A. Line B. Point
C. Triangle D. none of these
Ans. A
Sol. On P-T curve = Point
T-S curve = Line
U-V curve= Triangle
67. Wastes should always be___
A. recycled and reused
B. should be dumped in environment
C. should be stored in house
D. should be dumped in neighbors
house
Ans. A
Sol. We have to return our organic waste
where it belongs the soil rather than
sending banana peels, grass clipping
etc. to the municipal dump, and start
a compost pile instead. If you recycle
your yard and garden waste, you will
reduce the amount of energy used to
send this waste to the dump.
68. Which of the following is not an
advantage of rainwater harvesting?
A. Environment friendly
B. Increase ground water level
C. Mitigate drought effects
D. Contamination
Ans. D
Sol. Rainwater harvesting is a method of
collecting rainwater immediately from
the surfaces it has fallen directly
before it is lost as surface run off. It
can help to overcome the inadequacy
of surface water, improve
groundwater levels and quality,
reduces flood hazards and mitigates
effects of drought. However, there
can be a possibility of contamination
without proper cleaning or from
poorly constructed containers.
69. Two fluids 1 and 2 have mass
densities of p1 and p2 respectively. If
p1 > p2, which one of the following
expressions will represent the relation
between their specific volumes v1 and
v2?
A. v1 > v2
B. v1 < v2
C. v1 = v2
D. Cannot be determined due to
insufficient information.
Ans. B
Sol. Specific volume(v) is defined as the
volume(V ) per unit mass(m).
v = v⁄m = 1 / m⁄v = 1⁄p
where p is the mass density. Thus, if
p1 > p2, the relation between the
specific volumes v1 and v2
will be represented by v1 < v2.
70. Which of the following is the correct statement about availability ?
A. useful work that is obtainable in a process in which system comes to equilibrium with its surroundings.
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B. maximum useful work that is obtainable in a process in which system comes to equilibrium with its surroundings. C. minimum useful work that is obtainable in a process in which system comes to equilibrium with its surroundings. D. none of the above
Ans. B Sol. Maximum useful work is given by
total work minus pdV work. 71. Which of following is known as white
vitriol? A. Suphuric acid
B. Ferrous Sulphate C. Zinc Sulphate D. Copper Sulphate
Ans. C Sol. Zinc Sulfate is a white crystalline,
water-soluble compound. The hydrated form, zinc sulfate heptahydrate known as "white vitriol" and can be prepared by reacting zinc with aqueous sulfuric acid.
It is used in:- * Making lithopone * As a mordant in dyeing * As a preservative for skins and
leather * In medicine as an astringent and
emetic. 72. For a laminar flow of a pipe, head loss
is A. directly proportional to velocity
B. inversely proportional to velocity C. directly proportional to v2 D. inversely proportional to v2
Ans. A Sol. Hf for a laminar flow is 32µuavl/ƿgd2
hence directly proportional to uav 73. Which one of the following statement
was given by Clausius? A. It is impossible to construct a
device that can transfer heat from a cooler body to a hotter body without any work input B. It is impossible to construct a device that can transfer heat from a hotter body to a cooler body without any effect C. It is impossible to device a cyclically operating heat engine, the effect of which is to absorb energy in the form of heat from a single thermal reservoir and to deliver and equivalent amount of work. D. None of the mentioned
Ans. A
Sol. To transfer heat from a cooler body to
a hotter body, some work must be
expended.
74. If a memory chip is volatile, it will
_______.
A. Explode if exposed to high
temperatures
B. Lose its contents if power is
turned off
C. Be used for data storage only
D. Be used to both read and write
data
Ans. B
Sol. Random-access memory (RAM) is
normally associated with volatile
types of memory, where the stored
information is lost if power is
removed.
75. Which of the following correctly states
how the viscosities of a liquid and a
gas will change with temperature?
A. Viscosity increases with the
increase in temperature of a liquid
and decreases with the increase in
temperature of a gas
B. Viscosity increases with the
increase in temperature of a liquid
and increases with the increase in
temperature of a gas
C. Viscosity decreases with the
increase in temperature of a liquid
and decreases with the increase in
temperature of a gas
D. Viscosity decreases with the
increase in temperature of a liquid
and increases with the increase in
temperature of a gas
Ans. D
Sol. Viscosity of a liquid is due to the
cohesion between it’s molecules. With
the increase in temperature of a
liquid, cohesion decreases, leading to
the decrease in viscosity. Viscosity of
a gas is due to the momentum
transfer between it’s molecules. With
the increase in the temperature of a
liquid, molecular motion increases,
leading to the rise in viscosity.
76. Where is the head office of Central
Pollution Control Board located?
A. Noida B. New Delhi
C. Gandhi Nagar D. Bangalore
Ans. B
Sol. • The Central Pollution Control Board
(CPCB) has its head office in New
Delhi. • It was established in 1974 under the
Water (Prevention and Control of Pollution) Act, 1974.
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• It is the apex organisation in India in the field of pollution control. The board is led by its Chairperson.
77. The ratio of the maximum shear stress to average shear stress in a beam with circular cross sections is
A. 3:1 B. 2:1 C. 3:2 D. 4:3
Ans. D Sol. For a circular cross section,
max
avg
4
3
=
78. If the thermal efficiency of a Carnot heat engine is 40%, then Co-efficient of performance of a refrigerator working within same temperature limits would be:
A. 4.5 B. 3.5 C. 1.5 D. None of these
Ans. B Sol. ηHEAT ENGINE = 1/ COPHEAT PUMP
SO COPHEAT PUMP = 1
0.4=2.5
And COPHEAT PUMP = COPREFRIGERATOR + 1
SO COPREFRIGERATOR =2.5 + 1= 3.5 79. The torque acting on a body, rotating
with angular acceleration of α is given by
A. T = Iα B. T = I2α C. T = I2α2 D. T=Iα2
Ans. A Sol. Torque = I*α 80. Who was the first person to measure
the speed of light? A. Hippolyte Fizeau
B. Albert A. Michelson C. James Bradley D. Ole Romer
Ans. D Sol. Ole Romer was a Danish astronomer
who in 1676 made the first quantitative measurements of the speed of light.
Romer also invented the modern thermometer showing the temperature between two fixed points, namely the points at which water respectively boils and freezes.
81. The process of removal of environmental pollutants by humans is known as:
A. Bioremediation B. Autonomy C. Pasteurization D. None of the above
Ans. A
Sol. The term 'Bioremediation' is used for
the procedure in which the treatment
of pollutants or waste has occurred.
This treatment is done through the
use of microorganisms which further
break down the undesirable
substances. In this process, the
contaminated soils are also clean up.
82. 2 kg block is resting on a surface with
coefficient of friction=0.2, a force of 1
N is applied on block, the friction force
will be?
A. 4 N B. 3 N
C. 2 N D. 1 N
Ans. D
Sol. When a force of 1 N is applied on
block, the friction force will be 1 N as
friction forcwe is a self adjusting
force, if its limiting value is greater
than the force applied, friction force
becomes equal to the force applied to
stop that body. Here, maximum
friction force=2*0.2*10=4 N
approximately which is greater than 1
N. Therefore, friction force will be 1 N.
83. A simply supported beam of span l
and carrying uniform distributed load
w per unit length, then maximum
bending moment is given by:
A. WI2/2 B. WI2/4
C. WI2/8 D. WI2/16
Ans. C
Sol. Maximum bending moment occurs at
the centre for the above case as
shown in figure.
BENDING MAX = WL2/8
84. CPM is
A. Event oriented
B. Activity oriented
C. Both (A) and (B)
D. None of these
Ans. B
Sol. CPM is activity oriented.
85. Ratio of oxygen to acetylene for
complete combustion is
A. 1: 1 B. 1.5: 1
C. 2: 1 D. 2.5: 1
Ans. D
Sol. 2.5:1
Complete combustion of a
hydrocarbon occurs when oxygen gas
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in the surrounding air mixes
completely and is present in the
stoichiometric mole ratio to react
completely with the amount of
hydrocarbon. For acetylene, the mole
ratio is five moles of oxygen per two
moles of acetylene, or 2.5:1.
86. Verification of a login name and
password is known as_____.
A. configuration
B. accessibility
C. authentication
D. logging in
E. None of these
Ans. C
Sol. Authentication is a process in which
the credentials provided are
compared to those on file in a
database of authorized users'
information on a local operating
system or within an authentication
server.
87. Grinding wheel is specified as “A 46 K
10 V 27" . The grain size of a wheel
will be
A. Coarse B. Medium
C. Fine D. Very Fine
Ans. B
Sol. 46 represents grain size, which falls
under medium size
88. A jet strikes a curved plate at its
______
A. Sides
B. Surface
C. Centre
D. Does not strike
Ans. C
Sol. A jet strikes a curved plate at its
centre. Force exerted by a jet on a
stationery plate happens in three
cases. The three cases are classified
depending on their position. The
three cases are when plate is vertical,
plate is inclined and plate is curved
with respect to the jet.
89. Shortest Processing Time (SPT)
sequencing minimises the
A. mean flow time
B. inprocess inventory
C. mean lateness
D. All of the above
Ans. E Sol. The shortest processing time rule
orders the jobs in the order of increasing processing times. Whenever a machine is freed, the shortest job ready at the time will
begin processing. This algorithm is optimal for finding the minimum total completion time and weighted completion time. In the single machine environment with ready time at 0 for all jobs, this algorithm is optimal in minimizing the mean flow time, minimizing the mean number of jobs in the system, minimizing the mean waiting time of the jobs from the time of arrival to the start of processing, minimizing the maximum waiting time and the mean lateness.
90. In which book is the 'Sanyasi revolt'
mentioned? A. Discovery of India
B. Anandamath C. Geetanjali D. None of these
Ans. B Sol. Under the Sanyasi revolt (1763-
1800), people were banned from coming to pilgrimage places.
• From 1763 onwards, the Sanyasi Revolt or uprising had engulfed the area of Bengal, Bihar and Uttar Pradesh.
• Religious people were very upset due to restrictions on pilgrimages.
• This rebellion could be suppressed after a long campaign of Warren Hastings.
• This monstrous revolt has been mentioned by Bankim Chandra Chattopadhyay in his novel Anandmath.
91. Which of the following is also known as hydrated lime?
A. Sodium Hydroxide B. Calcium carbonate C. Calcium oxide D. Calcium hydroxide
Ans. D Sol. • Hydrated Lime, also known as
calcium hydroxide. • It is traditionally called slaked lime. • It is an inorganic compound. • Its molecular formula is Ca(OH)2 . 92. A technique of controlling noise
pollution by planting green plants or trees is known as –
A. Afforestation B. Green muffler C. Decibel meter D. None of the above
Ans. B Sol. In this technique, we can control
noise pollution by planting green plants, normally 4-5 rows of plants are grown near noisy areas like roadsides and industrial areas so that these trees can create some
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obstruction for noise to reach to residents.
93. What should be the value of Joule- Thompson coefficient for decrease in temperature during throttling process
A. Positive B. Zero C. Negative D. Can’t say
Ans. A Sol. for decrease in temperature during
throttling process
JTh
Tµ 0
P
=
94. Type of compressor used in domestic refrigerator
A. Centrifugal compressor B. Axial compressor C. Reciprocating compressor D. All of the above
Ans. C Sol. Reciprocating, Scroll Compressor and
Screw compressor are used in Domestic refrigerator.
95. A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific volume of the liquid will be
A. 1.0 l/kg B. 1.5 l/kg C. 2.0 l/kg D. 2.5 l/kg
Ans. B Sol. Specific volume(v) is defined as the
volume(V ) per unit mass(m). Thus,
1l / kg 1.5l / kg
6.5
9.81
= =
96. The process of improving the cutting action of the grinding wheel is called
A. Truing B. Dressing C. Facing D. Clearing
Ans. B Sol. The process of improving the cutting
action of the grinding wheel is called Dressing
97. The apparent weight of a man in a lift is less than the real weight when______
A. The lift is going down with an acceleration B. The lift is going up with uniform speed C. The lift is going down with uniform speed D. The lift is going up with an acceleration
Ans. A
Sol. • The apparent weight of a man in a
lift is less than the real weight when
the lift is going down with an
acceleration.
• The lift falls freely under gravity.
The man also falls freely under
gravity that's why the man feels that
he has lost his weight.
98. Which gas is present in highest
amount in natural gas?
A. Methane B. Ethane
C. Propane D. Butane
Ans. A
Sol. • The Highest amount of gas present
in Natural gas is Methane.
• The composition of gases in natural
gas is :
Methane = 60-90%
Ethane = 0-20%
Propane = 0-20%
Butane = 0-20%.
99. Which of the following is reason of
irreversibility?
A. Lack of equilibrium during the
process
B. involvement of dissipative effects
C. either a or b or both
D. none of the above
Ans. C
Sol. A reversible process is carried out
infinitely slowly, so that every state
passed through by the system is an
equilibrium state. In the irreversible
process every state will not be an
equilibrium state as it is carried out
very fast. Only the first and the last
state of the irreversible process are
the equilibrium states. Therefore lack
of equilibrium is a cause of
irreversibility.
In a dissipative effect the energy is
transformed from one form to
another form and the final form of
energy has a less capacity to do
mechanical work. Thus this process
becomes irreversible. Therefore
involvement of dissipative effect is
another cause of irreversibility.
100. Where is the tradition of Birha, Rasiya
and Hori folk songs?
A. Rajasthan
B. Madhya Pradesh
C. Uttar Pradesh
D. Gujarat
Ans. C
Sol. Birha, Rassia and Hori are the
popular Folk song genre of Uttar
Pradesh.
● Birha genre is mood based and the
basic theme revolves around the
separation of lover and his beloved.
● Rasiya is the form of folk music
that is mostly sung in this region on
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Holi. The Lathmar or 'Stick Beating'
Holi of Braj is very famous for its
numerous Rasiya.
● Hori is a genre of semi-classical
singing, which is popular in Uttar
Pradesh and Bihar. It comes under
the category of season songs.
101. A structural vertical member
subjected to an axial compressive
force is called
A. Beam B. Strut
C. Frame D. Column
Ans. D
Sol. A structural vertical member
subjected to an axial compressive
force is called column.
102. Torsion equation is given by
A. T T G
J L R
= =
B. T G
J R L
= =
C. T
J R LG
= =
D. T J
G R L
= =
Ans. B
Sol. Where,
T = twisting moment
J = polar moment of inertia
R= radius
G = modulus of rigidity
L = length of the shaft
Torsion equation is given by
T G
J R L
= =
103. Find acceleration of mass m1 (m2 >
m1) assuming pully is massless and
friction less
A. B.
C. D.
Ans. B
Sol.
T = m1g + m1a …(1)
T + m2a = m2g …(2)
⇒ T = m2g – m2a ….(2)
From (1) and (2)
m2g – m2a = m1g + m1a
104.
Which of the following relation is true
with respect to the diagram?
A. K1>K2 B. K1<K2
C. K1=K2 D. K2=0
Ans. A
Sol. Greater the slope, greater is the
temperature gradient which is
inversely proportional to thermal
conductivity. Therefore, the correct
answer is K1>K2 is the relation which
is true with respect to the diagram.
105. A 2 kg ball drops vertically onto the
floor with a speed of 25m/s. It
rebounds with an initial speed of
10m/s. The impulse action on the ball
during contact will be
A. 15 N-s B. 70 N-s
C. 30 N-s D. 10 N-s
Ans. B
Sol. Impulse = change in momentum
= mV2-mV1
= 2*10 -2*(-25)
= 20+50
= 70N-s
106. Side rake angle of a single point
cutting tool is the angle
A. By which the face of the tool is
inclined towards the back
B. By which the face of the tool is
inclined sideways
C. Between the surface of the flank
immediately below the point and a
plane at right angles to the center
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line of the point of the tool
D. Between the surface of the flank
immediately below the point and a
line drawn from the point
perpendicular to the base
Ans. B
Sol. Representation of the side rake angle
is as shown in figure below
107. Austempering of steel is done for
obtaining
A. Martensitic structure
B. Austenitic structure
C. Ferritic structure
D. Bainite structure
Ans. D
Sol. Austempering is a heat treating
process for medium to high carbon
ferrous metals which produces Banite
structure which has high strength and
toughness.
108. Which gas is responsible for “Global
Warming”?
A. Nitrogen (N2)
B. ethane
C. Carbon dioxide (CO2)
D. Sulphur dioxide (SO2)
Ans. C Sol. Global warming is caused by the
emission of greenhouse gasses. 72% of the totally emitted greenhouse gases are Carbon dioxide (CO2).18% methane and 9% nitrous oxide (NO2). Carbon dioxide emissions, therefore, are the most important cause of global warming.
109. With decrease in pressure, the latent heat of steam
A. Remains same B. Increases
C. Decreases D. Behaves unpredictably
Ans. B Sol. As saturation pressure decreases
enthalpy of vaporization corresponding to that saturation pressure increases.
110. A simply supported beam of length 4 m is with uniformly distributed load of 5 N/m. Find the maximum bending moment and point of contra flexure of the beam.
A. 20 Nm, at the centre of beam B. 10 Nm, at the fixed end of beam C. 20 Nm, does not exist D. 10 Nm, does not exist
Ans. D Sol. Maximum bending moment= Wl2/8
=10 Nm In this case, point of contra flexure
(the point where Bending moment=0) doesn’t exist.
111. Filler material is essentially used in A. gas welding
B. spot welding C. seam welding D. all of these
Ans. A Sol. Many gas welding processes, such as
lead burning, are typically autogenous and a separate wire filler rod of the same metal is only added if there is a gap to fill. Some metals, such as lead or Birmabright aluminium alloy, use offcut strips of the same metal as filler. Steels are usually welded with a filler alloy made specially for the purpose. To prevent rusting in storage, these wires are often lightly copper plated.
112. Which one of the following is a bad thermal conductor?
A. Aluminum B. Copper C. Glass D. Silver
Ans. C Sol. • Glass, wood and plastic are all
excellent insulators and bad thermal conductors.
• In glass, there is no flow of free electrons and hence it doesn't conduct heat but it is a good insulator which allows electricity and heat to pass through it by radiation following the law of optics.
113. In a refrigeration cycle the heat is absorbed by refrigerant at:
A. Evaporator B. Condenser C. Expansion valve D. Compressor
Ans. A
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Sol. Evaporator is a heat exchanger that works on low pressure side of a refrigerator. It picks up the heat of the room or space that is to be cooled.
114. In a vessel a large metacentric height A. Improves stability and makes
periodic time to oscillation longer B. lowers stability and makes periodic time of oscillation shorter C. Has no effect on stability and the periodic time of oscillation D. Improves stability and makes the periodic time of oscillation shorter
Ans. D Sol. Large metacentric height of floating
body ensures stability and shortens the time of oscillation.
115. According to Indian Standard specifications 50H7g6means that:
1) Actual size is 50 mm 2) Tolerance grade for hole is 7 3) Tolerance grade for shaft is 6 Which of the statements made above
are correct? A. 1 and 2 B. 1, 2 and 3
C. 2 and 3 D. None of these Ans. C Sol. In 50H7g6 50 represent basic size H7 represent hole tolerance zone in
which H is fundamental deviation and 7 means IT tolerance.
g6 represent shaft tolerance zone 116. What is the purpose of providing a
Draft folder in an email system? A. to save unsent emails
B. to store spam emails C. to save a copy of sent emails D. to store deleted emails
Ans. A Sol. A draft is simply an email message
you haven’t yet sent. It’s not the same thing as an email waiting to be sent. This act places the message into the Drafts folder.
117. How is mass number of an atom determined?
A. By total number of protons B. By total number of neutrons C. By adding number of protons and neutrons D. By total number of electrons
Ans. C
Sol. • The number of protons and
neutrons combined to give us the
mass number of an atom.
• As both protons and neutrons are
present in the nucleus of an atom,
they are together called nucleons.
• Atomic mass is expressed in atomic
mass units or amu.
118. Grinding wheel is specified as “A 46
K 10 V 27”. Type of wheel will be
A. Hard B. Soft
C. Medium D. Can’t say
Ans. C
Sol. K represents the hardness of the
wheel, notation I-P fall under medium
119. What kind of server converts IP
addresses to domain names?
A. DNS B. MNS
C. UTP D. RTP
Ans. A
Sol. The Domain Name System (DNS) is
a hierarchical distributed naming
system for computers, services, or
any resource connected to the
Internet or a private network.
120. Pumps in parallel in order have
A. constant discharge
B. constant rpm
C. constant head
D. variable discharge, head and rpm
Ans. C
Sol. Pumps in parallel in order have
constant head, head=c while in series
have constant discharge.
121. Which of the following is not a
greenhouse gas?
A. Water vapour
B. O2
C. O3
D. CO2
Ans. B
Sol. The primary greenhouse gases in the
Earth's atmosphere are water vapor,
carbon dioxide, methane, nitrous
oxide, and ozone. Hence from the
given options O2 is the only gas which
is not a green house gas.
122. Which of the following factors
adversely affect the characteristics of
the surface water?
A. Vegetation
B. Soil type
C. Degree of weathering
D. All of the above
Ans. D
Sol. Factors that adversely affect the
characteristics of surface water is the
extent of surface pollution that in turn
depends on the hydrological
characteristics, vegetation, soil type,
and degree of weathering of rocks.
Various physical, chemical and
biological characteristics of waste
emitted in the surface water are also
critical factors. Techniques for the
treatment of domestic wastewater
and disposal systems also play a
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crucial role in determining the
characteristics of surface water.
123. What is the capital of Cyprus?
A. Asgabat B. Phnom Penh
C. Ankara D. Nicosia
Ans. D
Sol. * Capital of Cyprus is Nicosia.
* Cyprus is an island in the Eastern
Basin of the Mediterranean Sea.
* It is the third largest island in the
Mediterranean and world’s 80th
largest island by area.
124. Artificial Intelligence is associated
with which generation?
A. First
B. Fifth
C. Third
D. Any of the above
Ans. B
Sol. This fifth generation is based on
parallel processing hardware and
Artificial Intelligence software.
Note:- AI is an emerging branch in
computer science, which interprets
means and method of making
computers think like human beings.
125. The crystal structure of austenite is
A. BCC B. FCC
C. HCP D. BCT
Ans. B
Sol. It has face centred cubic structure.
126. Heat is transferred from an insulated
pipe to the surrounding still air by
______.
A. Conduction
B. Convection
C. Radiation
D. All options are correct
Ans. C
Sol. There will be no heat transfer from
the surface as heat transfer by
conduction and convection always
requires contact surface area, as the
pipe is insulated heat transfer from
the surface will not take place.
But radiation heat transfer takes
place even in vacuum, that even after
insulation there will be some radiation
heat transfer. 127. Noise can be recorded in – A. Ammeter B. Hygrometer
C. Barometer D. Decibel meter Ans. D Sol. Noise is 'unpleasant and unwanted
sound'. It can be recorded in Decibel meter. Different Decibel (dB) units for various activities.
128. According to which article of the Constitution, the executive power of
the Union will be vested in the President ?
A. Article 51 B. Article 56 C. Article 53 D. Article 50
Ans. C Sol. Article 53 of the Constitution says
that the executive power of the Union shall be vested in the President and shall use it according to this constitution either by himself or by his subordinate officer.
• Article 52 of the Constitution stipulates a President for India .
129. In a certain Heat Exchanger, both fluids have R=1. The hot fluid enters at 70 C and leaves at 40 C;cold fluid enters at 20 C and leaves at 50 C . Effectiveness of the exchanger is
A. 1.66 B. 0.8 C. 0.6 D. 1
Ans. C Sol. Effectiveness of the HE is= 70-40/70-
20=3/5=0.6 130. Which of the following is correct? A. There will be no flow across the
streamtube B. There will be no flow along the streamtube C. There will be no flow both across the streamtube and along it D. There will be flow both across the streamtube and along it
Ans. A Sol. Streamtube is a fluid mass bounded
by a group of streamlines. Since, the movement of the fluid mass can only be along the streamlines and never across them, there will be no flow across the streamtube
131. When the temperature of a fixed bar is increased, the stress induced in the bar is
A. Tensile B. Compressive C. Both a and b D. Shear
Ans. B Sol. When the temperature of a fixed bar
is increased then its length should increase but due to thermal stress which is compressive in nature the length of the fixed bar do not increase.
132. The rake angle of a cutting tool is 15°,
the shear angle is 45° and the cutting
velocity is 35 m/min. What is the
velocity of chip along the tool face?
A. 28.5 m/s B. 27.3 m/s
C. 25.3 m/s D. None of these
Ans. A
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Sol. From velocity triangle relation
between chip velocity and cutting
velocity is
( )V Vc
sincos –=
Where v cutting velocity, Vc chip
velocity
ϕ shear angle, α rake angle
So Vc=28.5 m/s
133. The Roots blower and vane-type
compressor are the types of
A. displacement compressor
B. steady-flow compressor
C. both of the mentioned
D. none of the mentioned
Ans. A
Sol. These are the two types of rotary
positive displacement machines.
134. The sequencing of jobs in the
ascending order of their processing
time, is called
A. shortest processing time
B. earlier due date (EDD)
C. dispatching
D. none of these
Ans. A
Sol. In this rule, job with shortest
processing time is considered first
then next and so on. It
simply means that arranging
processing time in ascending order,
the job sequence could be found.
135. Concurrent force system is the
system when:
A. Lines of action of all forces pass
through a point
B. Lines of action of all forces are
parallel to each other
C. Lines of action of all forces lie
along same line
D. Lines of action of all forces are
not parallel to each other
Ans. A
Sol. Concurrent force system is a type of
system of forces in which line of
action of all the forces meet at a
point. If line of action of forces lie
along the same line known as
collinear system of forces.
136. A spherical vessel with an inside
diameter of 2 m is made of material
having an allowable stress in tension
of 500 kg/cm2. The thickness of a
shell to withstand a pressure of 25
kg/cm2 should be:
A. 5 cm B. 10 cm
C. 2.5 cm D. 1.25 cm
Ans. C
Sol. Since pd
4t =
Where t : thickness of shell
So 25 200
t 2.5 cm4 500
= =
.
137. Rotary compressors are used where
____ quantities of gas are needed at
relatively ____ pressure.
A. large, high B. large, low
C. small, high D. small, low
Ans. B
Sol. Rotary compressors are used where
large quantities of gas are needed at
relatively low pressure.
138. Haematite iron ore contains iron
about
A. 30% B. 45%
C. 55% D. 70%
Ans. D
Sol. Pure hematite mineral contains
69.9% iron.
139. Which session of the Indian National
Congress approved Gandhi Irwin
Pact?
A. Lahore Session
B. Calcutta Session
C. Kanpur Session
D. Karachi Session
Ans. D
Sol. • The Gandhi Irwin Pact was endorsed
by the Congress in the Karachi
Session of 1931, that was held from
March 26-31. Gandhi was nominated
to represent Congress in the Second
Round Table Conference. Just a week
back, Bhagat Singh, Sukhdev and
Rajguru had been executed. So, there
was anger in the public whose point
was that why Gandhi did accept to
sign the pact.
140. What is the function of job
evaluation?
A. determining relative worth of jobs
B. determining skills required by a
worker
C. determining contribution of a
worker
D. determining contribution of a job
Ans. A
Sol. A job evaluation is a systematic way
of determining the value/worth of a
job in relation to other jobs in an
organization. It tries to make a
systematic comparison between jobs
to assess their relative worth for the
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purpose of establishing a rational pay
structure.
141. The value of normal stress at the
principal plane is
A. Maximum
B. Minimum
C. Either maximum or minimum
D. Average of maximum and
minimum
Ans. C
Sol. The value of normal stress at the
principal plane is either maximum or
minimum.
142. In the free expansion process
A. W=0 B. Q=0
C. du=0 D. All of these
Ans. D
Sol. In free expansion, there is no net heat
interaction and work done by the
system.
143. What are the ores of Lead (Pb)?
A. Zincite (ZnO) and Zinc blende
(ZnS)
B. Cinnabar (HgS)
C. Galena (PbS) and Cerrusite
(pbCO3)
D. Haematite (Fe2O3) and Magnetite
(Fe2O4)
Ans. C
Sol. Galena (PbS) and Cerrusite
(pbCO3) are the ores of Lead (Pb).
Lead is the most abundant of the
transition metal elements
(Greenwood and Earnshaw
1984).
Lead is a chalcophile metallic element
forming several important minerals
,including galena PbS, anglesite
PbSO4, Cerrusite PbCO3 and
minimum Pb3O4.
Lead is a chemical element with
symbol Pb (from the Latin Plumbum)
and atomic number 82. It is a heavy
metal that is denser than most
common materials.
144. In what context was “Nari Tu
Narayani” used by Nirmala
Sitharaman in Budget 2019-20?
A. Maternity Benefits
B. Women Empowerment
C. Self Help Groups
D. Mahila Shakti Kendras
Ans. B Sol. * Union Finance Minister Nirmala
Sitharaman quotes “Nari Tu Narayani” in her maiden budget speech in the context of women empowerment.
* Nirmala Sitharaman is a member of Rajya Sabha.
* She is currently serving as the Minister of Finance and Minister of Corporate Affairs. She is the second female Finance Minister after Indira Gandhi.
145. In which year Hima Das was honored with the Arjuna Award by the President of India?
A. 2017 B. 2014 C. 2018 D. 2019
Ans. C Sol. • Hima Das was conferred with
Arjuna Award by the President of India on 25th September 2018.
• The Arjuna Awards are given by the Ministry of Youth Affairs and Sports, Government of India to recognize outstanding achievement in sports.
• It was started in 1961. • The award carries a cash prize of
₹500,000, a bronze statue of Arjuna and a scroll.
• Hima Das is the first Indian athlete to win a gold medal in a track event at the IAAF World U20 Championships.
146. Which of the following equation is valid?
A. TdS = dH + Vdp B. TdS = dH – Vdp C. TdS = –dH – Vdp D. TdS = –dH + Vdp
Ans. B Sol. We get equation (B) by using TdS =
dU + pdV and H = U + pV. 147. The gases present in the atmosphere
that cause greenhouse effect are__ A. Carbon dioxide, oxygen, nitrogen
B. Carbon dioxide, sulphur dioxide, methane C. Nitrous oxide, oxygen, water vapours D. Methane, water vapours, carbon dioxide
Ans. D Sol. The gases present in the atmosphere
that cause the greenhouse effect are methane, water vapors, carbon dioxide. Greenhouse gasses are those gases which absorb and emits radiant energy within the thermal infrared range.
148. In which type of thermometer two
different types of metal wires are
joined together at two junctions?
A. Resistance Thermometer
B. Bimetal Thermometer
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C. Thermistor Thermometer
D. Thermocouple Thermometer
Ans. D
Sol. In Thermocouple Thermometer,
two different types of metal wires are
joined together at two junctions. A
temperature difference between
the junctions actually makes the
metals to produce a small electric
current which moves the metal
needle across the scale.
149. During the boot process, the
________ looks for the system files.
A. CD B. BIOS
C. CPU D. DVD
Ans. B
Sol. BIOS (basic input/output system) is
the program a personal computer's
microprocessor uses to get the
computer system started after you
turn it on. It also manages data flow
between the computer's operating
system and attached devices such as
the hard disk, video adapter,
keyboard, mouse and printer.
150. The Helmholtz function F is given by
A. U – TS B. U + TS
C. –U – TS D. –U + TS
Ans. A
Sol. Helmholtz function F is a property
which is defined by the relation F=U-